Storage full but isnt

Hey, I wasn't able to sync any files due to storage limit. The increase didn't make any sense so I went ahead and transferred all my files off Box. Now, with not even a single file, it shows that I'm using 24.4GB?! Where are they coming from? I've been a user for years and trying to figure if it's worth staying or changing since I've already offloaded my data...wasted several hours just to do this and it wasn't the first time I ran into those storage issues...